A Drosophila homologue of oxysterol binding protein (OSBP)--implications for the role of OSBP.
The identification of a Drosophila homologue (OSBP-Dm) of mammalian oxysterol binding protein (OSBP) is reported. OSBP-Dm was identified by its ability to overcome the cell cycle arrest induced by over-expression of Wee1p in fission yeast. OSBP-Dm has an overall sequence identity of 52% with mammalian OSBP, and shows a number of highly conserved regions of functional significance. Insects are unable to biosynthesize the steroid core, relying instead on dietary sterols to satisfy their requirements. It is therefore unlikely that OSBP-Dm is involved in feedback inhibition of the mevalonate pathway, as has previously been suggested for its mammalian homologues.
Alphey
L
L
School of Biological Sciences, University of Manchester, UK. Luke.Alphey@zoo.ox.ac.uk
Jimenez
J
J
Glover
D
D
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002352:Carrier Proteins; D018076:DNA, Complementary; D029721:Drosophila Proteins; D004331:Drosophila melanogaster / Q000235:genetics*; D006801:Humans; D019476:Insect Proteins / Q000235:genetics* / Q000378:metabolism; D016350:Leucine Zippers; D008969:Molecular Sequence Data; D011817:Rabbits; D011987:Receptors, Steroid / Q000235:genetics* / Q000378:metabolism; D017386:Sequence Homology, Amino Acid; D000098825:Oxysterol Binding Proteins
D002352:Carrier Proteins; D018076:DNA, Complementary; D029721:Drosophila Proteins; D019476:Insect Proteins; C513774:Osbp protein, Drosophila; D011987:Receptors, Steroid; D000098825:Oxysterol Binding Proteins